I've always felt like vote rewards are cheating. You want to vote for my server? Great! I'm glad you love it that much! But I don't feel like garnering votes is payng someone off to get them.

And blueprints with credits.....right now, the economy (such as it is) in the game makes it way too easy to become a millionaire. I know the Great Grey Cat has plans to fix this, but until they are implemented, I think buying with blocks is the better option.